DAR ES SALAAM, Tanzania (Reuters) -- A U.N. court trying the masterminds of the 1994 Rwandan genocide on Monday began to hear a case against a former sports ministry official whose popular songs were said to have encouraged the killings. Simon Bikindi, a musician and former official in Rwanda's Ministry of Youth and Sports, was arrested in the Netherlands in 2001. He faces six counts of genocide to which he has pleaded not guilty. "He was the singer whose popular songs were supposed to have encouraged people to commit genocide," Timothy Gallimore, spokesman for Arusha-based International Criminal Tribunal for Rwanda...